tires LEXUS IS300 2021 Workshop Manual

3878-1. Specifications
8
Vehicle specifications
Wheel diameter
Bead
Sidewall
Shoulder
Tread
Belt
Inner liner
Reinforcing rubber
Carcass
Rim lines
Bead wires
Chafer
This information has been prepared in
accordance with regulations issued by
the National Highway Traffic Safety
Administration of the U.S. Department
of Transportation.
It provides the purchasers and/or pro-
spective purchasers of Lexus vehicles
with information on uniform tire quality
grading.
Your Lexus dealer will help answer any questions you may have as you read this
information.
■DOT quality grades
All passenger vehicle tires must con-
form to Federal Safety Requirements in
addition to these grades. Quality
grades can be found where applicable
on the tire sidewall between tread
shoulder and maximum section width.
For example: Treadwear 200 Traction AA
Temperature A
■Treadwear
The treadwear grade is a comparative
rating based on the wear rate of the tire
when tested under controlled condi-
tions on a specified government test
course.
For example, a tire graded 150 would wear
one and a half (1 - 1/2) times as well on the
government course as a tire graded 100.
The relative performance of tires depends
upon the actual conditions of their use.
Performance may differ significantly from
the norm due to variatio ns in driving habits,
service practices and differences in road
characteristics and climate.
■Traction AA, A, B, C
The traction grades, from highest to
lowest, are AA, A, B and C, and they
represent the tire’s ability to stop on
wet pavement as measured under con-
trolled conditions on specified govern-
ment test surfaces of asphalt and
concrete.
A tire marked C may have poor traction
performance.
Warning: The traction grade assigned to
this tire is based on braking (straight
ahead) traction tests and does not include
Tire section names
Uniform Tire Quality Grading
C
A
B
C
D
E
F
G
H
I
J
K

3888-1. Specifications
cornering (turning) traction.
■Temperature A, B, C
The temperature grades are A (the
highest), B, and C, representing the
tire’s resistance to the generation of
heat and its ability to dissipate heat
when tested under controlled condi-
tions on a specified indoor laboratory
test wheel.
Sustained high temperature can cause the
material of the tire to degenerate and
reduce tire life, and excessive temperature
can lead to sudden tire failure. Grade C corresponds to
a level of perfor-
mance which all passenger car tires must
meet under the Fede ral Motor Vehicle
Safety Standard No. 109.
Grades B and A represent higher levels of
performance on the laboratory test wheel
than the minimum required by law.
Warning: The temperature grades of a tire
assume that it is properly inflated and not
overloaded.
Excessive speed, unde rinflation, or exces-
sive loading, either separately or in combi-
nation, can cause heat buildup and
possible tire failure.
Glossary of tire terminology
Tire related termMeaning
Cold tire inflation pressure
Tire pressure when the vehicle has been parked for
three hours or more, or has not been driven more
than 1 mile or 1.5 km under that condition
Maximum inflation pressureThe maximum cold inflated pressure to which a tire
may be inflated, shown on the sidewall of the tire
Recommended inflation pressureCold tire inflation pressure recommended by a
manufacturer
Accessory weight
The combined weight (in excess of those standard
items which may be replaced) of automatic trans-
mission, power steering, power brakes, power win-
dows, power seats, radio and heater, to the extent
that these items are available as factory-installed
equipment (whether installed or not)
Curb weight
The weight of a motor vehicle with standard equip-
ment, including the maximum capacity of fuel, oil
and coolant, and if so equipped, air conditioning
and additional weight optional engine

4048-3. Initialization
8-3.Initialization
*:If equipped
Items to initialize
The following items must be initialized for normal system operation after such
cases as the battery being reconnected, or maintenance being performed on
the vehicle:
List of items to initialize
ItemWhen to initializeReference
PKSB (Parking Support
Brake)
*• After reconnecting or changing the batteryP.225
Intuitive parking assist*• After reconnecting or changing the batteryP.212
Message indicating
maintenance is
required
• After the maintenance is performedP.286
Oil maintenance• After the maintenance is performedP.298
Tire pressure warning
system
• When rotating the tires
• When the tire inflation pressure is
changed such as when changing trav-
eling speed or load weight
• When changing the tire size
P.308
Lexus parking assist
monitor
*
• Battery has been reinstalled.
• The steering wheel has been moved while the battery was being reinstalled.
• Battery power is low.Refer to the “NAVI-
GATION AND MUL- TIMEDIA SYSTEM OWNER’S MAN- UAL”.
Panoramic view moni-
tor
*
• Battery has been reinstalled.
• The steering wheel has been moved while the battery was being reinstalled.
• Battery power is low.Refer to the “NAVI-
GATION AND MUL- TIMEDIA SYSTEM OWNER’S MAN- UAL”.

428Alphabetical Index
Parking Support Brake function (for rear-crossing vehicles) .......................... 232Function .......................................................... 232
Parking Support Brake function (static objects) ......................................................... 226Function .......................................................... 226
PCS (Pre-Collision System) Function ............................................................170
PCS OFF switch .......................................... 173
Warning light ............................................... 342
Personal lights............................................... 263
PKSA (Parking Support Alert) ..............208
PKSB (Parking Support Brake)............... 221 Warning message..................................... 225
Power easy access system ....................... 108
Power outlets .................................................. 271
Power steering (Elect ric power steering
system).......................................................... 238 Warning light ...............................................340
Power window switch lights .................... 263
Power windows Door lock linked window operation... 119
Jam protection function............................. 118
Operation......................................................... 118
Window lock switch ................................... 119
Pre-Collision System (PCS) Function ............................................................170
PCS OFF switch .......................................... 173
Warning light ............................................... 342
R
Radar cruise control (dynamic radar cruise control with full-speed range)...............192
Radiator ...........................................................300
RCTA Function ............................................................ 216
Warning message....................................... 217
RCTA (Rear Cross Traffic Alert) .........208
RCTA function ............................................... 217
Rear Cross Traffic Alert (RCTA) ........... 216
Rear seats .........................................................107 Head restraints ................................................ 111 Rear side marker lights
Light switch .................................................... 149
Rear sunshades .............................................272
Rear turn signal lights Replacing light bulbs .................... 322, 323
Turn signal lever ...........................................142
Wattage ........................................................... 381
Rear view mirror Inside rear view mirror ............................... 114
Outside rear view mirrors........................ 116
Rear window defogger ............................. 255
Refueling Capacity ......................................................... 374
Fuel types ....................................................... 374
If the fuel filler do or cannot be opened
......................................................................... 359
Opening the fuel tank cap ....................... 161
Remote Touch .............................................. 248
Replacing Electronic key battery ............................... 316
Fuses.................................................................. 318
Light bulbs .......................................................321
Tires ..................................................................349
Resetting the message indicating mainte- nance is required ...................................... 286
Rev indicator .....................................................73
Rev peak..............................................................74
Road Sign Assist ........................................... 189
RSA (Road Sign Assist) ............................. 189
S
Seat belt reminder light............................. 340
Seat belts............................................................ 24 Automatic Locking Retractor................. 26
Child restraint system installation ......... 42
Cleaning and maintaining the seat belt..........................................................................283
Emergency Locking Retractor .............. 26
How to wear your seat belt ..................... 25
How your child should wear the seat belt ............................................................................. 25

429Alphabetical Index
Pregnant women, proper seat belt use.............................................................................24
Reminder light and buzzer ...................340
Seat belt extender ........................................ 25
Seat belt pretensioners ...............................27
SRS warning light ......................................338
Seat heaters ..................................................... 261
Seat position memory................................. 108
Seat ventilators ............................................... 261
Seating capacity.............................................132
Seats Adjustment..................................................... 106
Adjustment precautions .......................... 106
Child seats/child restraint system installa-tion ...................................................................... 41
Cleaning......................................................... 283
Driving position memory........................ 108
Head restraints ................................................ 111
Power easy access system .................... 108
Properly sitting in the seat .........................23
Seat heaters .................................................... 261
Seat position memory .............................. 108
Seat ventilators.............................................. 261
Sensor Automatic headlight system...................149
Automatic High Beam system............... 151
Inside rear view mirror............................... 115
Intuitive parking assist................................210
LTA (Lane Tracing Assist)..................... 180
Parking Support Brake function (rear-crossing vehicles)...................... 232
Parking Support Brake function (static objects).........................................................227
Radar sensor..................................... 164, 204
Rain-sensing windshield wipers.......... 159
RCTA ................................................................ 217
Service reminder message ..................... 286
Shift lever Automatic transmission ........................... 138
Side airbags ...................................................... 28
Side marker lights Light switch .....................................................149 Replacing light bulbs ................................ 322
Side mirrors Adjustment ....................................................... 116
BSM (Blind Sport Monitor)..................202
Folding................................................................ 117
Linked mirror functi on when reversing
............................................................................. 116
Mirror position memory ..........................108
RCTA function ..............................................216
Side turn signal lights Replacing light bulbs ................................ 322
Turn signal lever ...........................................142
Side windows ................................................... 118
Smart access system with push-button startAntenna location ........................................... 99
Entry functions ................................................ 92
Starting the engine ......................................134
Snow mode ..................................................... 140
Snow tires ....................................................... 243
Spare tire......................................................... 349 Storage location ........................................ 350
Spark plug ...................................................... 376
Specifications ................................................ 372
Speedometer .................................... 71, 72, 80
Steering lock Column lock release ..................................134
Steering lock system warning message............................................................................134
Steering wheel Adjustment ....................................................... 113
Heated steering wheel ..............................261
Meter control switches ...............................77
Power easy access system .................... 108
Steering wheel position memory........108
Stop lights Replacing light bulbs ................................ 322
Storage features .......................................... 266
Stuck If the vehicle becomes stuck ............... 368
Sun visors .......................................................... 271

431Alphabetical Index
TiresChains ............................................................. 244
Checking .......................................................303
If you have a flat tire .................................. 349
Inflation pressure.......................................... 312
Information ....................................................384
Replacing ....................................................... 349
Rotating tires ............................................... 305
Size.................................................................... 379
Snow tires ...................................................... 243
Spare tire........................................................ 349
Tire inflation pressu re display function
........................................................................ 305
Tire pressure warning system ............ 305
Warning light .................................................341
Tools.................................................................. 350
Top tether strap.................................................51
Total load capacity ...................................... 372
Towing Dinghy towing ...............................................133
Emergency towing .....................................331
Towing eyelet .............................................. 333
Trailer towing ................................................. 132
TRAC (Traction Control) ........................ 238
Traction Control (TRAC) ........................ 238
Trailer towing ..................................................132
Transmission Automatic transmission ........................... 138
Driving mode select switch .................. 236
M mode ..............................................................141
Paddle shift switches ......................... 140, 141
Snow mode ................................................... 140
Trip meters .........................................................75
Trunk .................................................................... 96 Internal trunk release lever ...................... 98
Smart access system with push-button start ................................................................... 97
Trunk features..............................................268
Trunk lid light................................................... 97
Trunk light......................................................... 97
Trunk opener main switch ....................... 98
Trunk opener switch ................................... 97 Wireless remote control ........................... 97
Trunk lid light .....................................................97
Trunk light ...........................................................97 Wattage ........................................................... 381
Turn signal lights Replacing light bulbs ................................ 322
Turn signal lever ...........................................142
V
Vanity lights...................................................... 271Wattage ........................................................... 381
Vanity mirrors ................................................. 271
VDIM (Vehicle Dynamics Integrated Man- agement)...................................................... 238
Vehicle data recording ....................................6
Vehicle Dynamics Integrated Manage- ment (VDIM).............................................. 238
Vehicle identification number ................ 372
Vehicle Stability Control (VSC) ........... 238
Ventilators (seat ventilators).....................261
VSC (Vehicle Stability Control) ........... 238
W
Warning buzzers ABS ...................................................................339
Airbags........................................................... 338
Approach warning......................................197
Brake hold .....................................................343
Brake Override System .........................339
Brake system................................................ 337
Charging system....................................... 338
Downshifting ......................................... 141, 142
Drive-Start Control...................................339
Electric power steering.......................... 340
Engine............................................................. 338
Hands off steering wheel warning (LTA)........................................................................... 188
High coolant temperature..................... 337
Intuitive parking assist ..................... 215, 341
Low engine oil pressure........................ 338
LTA (Lane Tracing Assist) 180, 183, 341